CN100372346C - A media server based on soft switch - Google Patents
A media server based on soft switch Download PDFInfo
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Abstract
The present invention relates to a media server based on soft switch, which comprises a prepositive computer which is used as a host machine, a plurality of postposition computers which are used as slave computers, and a plurality of operation maintaining computers, wherein the prepositive computer is composed of a general message module, a protocol stack module, a resource control module, an access module for operation maintenance and an apolegamic resource processing module; the protocol stack module, the resource control module, the access module for operation maintenance and the apolegamic resource processing module are respectively connected with the general information module; each of the postposition computers comprises a general message module and a resource processing module which are mutually connected; the information interaction between the prepositive computer and each of the postposition computers, and the information interaction between the access module for operation maintenance and each of the operation maintaining computers are realized by communication circuits. The media server can support various signaling protocols of a next generation network and fully support wide media resources of various basic telecommunication services and value-added services of the next generation network; simultaneously, the structural arrangement is flexible and convenient. The present invention has the advantages of reliable operation and good expandability; besides, the total processing capacity of the media server can be greatly improved.
Description
Technical field
The present invention relates to a kind of media server, exactly, relate to a kind of server that in next generation network (NGN, Next Generation Network), is used to provide various media resources based on soft switch; Belong to the media information processing unit technical field in the communication network.
Background technology
In various telecommunication services, there are some special media resources of quite a few service needed to cooperate (for example: playback resource, recording resource, phonetic synthesis resource etc.), therefore, in communication network, being used to the equipment of various media resources is provided is indispensable important network element.
Interactive voice response system (IVR, Interactive Voice Response) and ip intelligent peripherals (IP, Intelligent Peripheral) are two kinds of exemplary apparatus that are used to provide multiple media resource in the current communication network.Both can both provide five kinds of resources such as playback resource, recording resource, phonetic synthesis resource, literary composition language tts resource, teleconference bridge for this, and wherein ip intelligent peripherals also has the ability of resources such as fax, video conference bridge, navigation menu, protocol converter, video server, call bearer control gateway are provided.
But interactive voice response system belongs to the marginal technology of conventional fixed communication network, and ip intelligent peripherals belongs to traditional intelligence dictyosome system, and network architecture, agreement, function and performance etc. that they both are supported all do not meet with the next generation network system.For example: at first, interactive voice response system and ip intelligent peripherals all are to use signalling system No.7, still do not support the novel agreement of internet protocol-based IP, session initiation protocol (SIP for example, Session Initiation Protocol), signaling transmit H.248 protocol suite (SIGTRAN, SignalingTransport) etc.Secondly, interactive voice response system and ip intelligent peripherals belong to enclosed type on business provides, and be only open to operator, do not meet the development trend that the desired business development ability of next generation network is opened to the third party.Moreover interactive voice response system and ip intelligent peripherals all are based on circuit switching, can not be applied in the next generation network environment based on packet switching.In addition, from physical layer and data link layer, signaling that interactive voice response system and ip intelligent peripherals are external and bearing interface generally are the E1 interfaces, and this class interface will progressively eliminated to the evolution process of next generation network from legacy network.Therefore, interactive voice response system and ip intelligent peripherals can not satisfy based on Internet protocol IP, based on the requirement of the next generation network of packet switching.
Though, Chinese invention patent application " seamless, scalable distributed media server " (publication number: CN1324461A) provide a kind of multimedia server that is used for Internet, so that reduce the bottleneck effect of system.But the problem that this application for a patent for invention solves is not suitable for communication network at Internet, especially is not suitable for the special technical requirement of Next Generation Telecommunication Networks network to media server.Therefore, research and develop a kind of media server,, become a technical problem of being badly in need of solution to adapt to the developing direction of communication network to network N GN of future generation based on soft switch.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of media server based on soft switch, this media server can be supported the various signaling protocols in the next generation network, for various basic telecommunications business and value-added service in the next generation network provide the support of media resource widely.
In order to achieve the above object, the invention provides a kind of media server based on soft switch, its technical scheme is: this device includes: a front end processor as main frame, many rearmounted machine and Duo Tai Operation and Maintenance machines as slave; Described front end processor includes: universal information module, and the protocol stack module, resource control module and the Operation and Maintenance access module that are connected respectively with this universal information module; Rearmounted machine includes: interconnective universal information module and resource processing module; All realize information interaction wherein between the universal information module of front end processor and each rearmounted machine, and between the Operation and Maintenance access module of front end processor and each Operation and Maintenance machine by communication line; Described front end processor can be matched the resource processing module, the function of this resource processing module is: be used to provide various media resources, and comprise the reception and the transmission of realtime transmission protocol RTP (Real-time Transport Protocol) and RTCP Real-time Transport Control Protocol RTCP (Real-timeTransport Control Protocol) media bearer protocol message at least with external network entity, realize the two-way exchange of audio/video media information; Accept the control of resource control module, control the use of media resource by bottom hardware integrated circuit board resource or the API API (Application ProgrammingInterface) that calls the Digital Signal Processing DSP of form of software, make the resource control module can adapt to various bottom API API.
The function of described front end processor is: include but not limited to SIP signaling or the H.248 transmitting-receiving transmission of signaling by protocol stack module and external network entity; Various media resources to this media server carry out unified management, distribution and control; Each rearmounted machine is carried out flow control and load balancing control; Carry out information interaction by Operation and Maintenance access module and Operation and Maintenance machine, various operation/maintenance commands that reception and executable operations maintenance machine send at front end processor, and return execution result; And represent rearmounted machine to receive various operation/maintenance commands that the Operation and Maintenance machine sends, and be transmitted to corresponding rearmounted machine at rearmounted machine.
Described protocol stack module comprises two submodules: finish the protocol stack front terminal module that the message bag of the transport layer of standard signaling message and following protocol layer is handled, and the protocol stack of finishing the encoding and decoding of standard signaling message is acted on behalf of submodule; The function of this protocol stack module is: externally carry out protocol conversion between controlled entity and the internal resource control module, finish the encoding and decoding of signaling message.
Described protocol stack is acted on behalf of submodule and is acted on behalf of submodule H248PAM (H.248Protocol stack Agent Module) and Session Initiation Protocol stack by protocol stack H.248 and act on behalf of submodule SIPPAM (SIP Protocolstack Agent Module) two parts and form, these two protocol stacks are acted on behalf of submodule and are utilized universal information agreement GMP respectively decode later H.248 protocol message or Session Initiation Protocol message to be encapsulated, and offer respectively by the universal information module and H.248 to use submodule H248AppM or SIP and use submodule SIPPAM; The H.248 protocol message that the process that H248 application submodule H248AppM or SIP application submodule SIPAppM produce self with GMP is encoded or the essential information of Session Initiation Protocol message do not encapsulate respectively, and send this two agency by agreement submodules respectively to by the universal information module, issue the control appliance of media server after by these two agency by agreement submodules message being encoded again.
The universal information module of described front end processor comprises two submodules: finish the real-time messages submodule of the distribution of signaling and other real-time messages and route control, and finish the distribution that comprises Operation and Maintenance message and webmaster message at least and the non real-time message submodule of route control; This universal information functions of modules is as between each module of front end processor and the signal centre between front end processor and the rearmounted machine, for the communication between each module provides route and transmits message.
Described resource control module comprises:
Resource management submodule RMM (Resource Management Module) is used for managing this device and relates to SIP and the H.248 management of resource capability and the various resources of control protocol itself; This submodule obtains the loading of the Digital Signal Processing DSP ability of the hardware integrated circuit board ability of media server and form of software by the resource distribution file; And use submodule SIPAppM and provide the various descriptions of resource (for example according to dialing tone for H.248 using submodule H248AppM and SIP, the identifier toneId of voice such as busy tone obtains the name of voice document, the transport layer protocol that access is used to carry realtime transmission protocol RTP is the port numbers of User Datagram Protoco (UDP) UDP, the coding/decoding capabilities of the aforementioned port of access etc.) and with protocol-dependent resource (for example H.248 the destination node of agreement identifies terminationId, Context identifier contextId, pre-loaded dialing numeric string form digitMap etc.);
H.248 use submodule H248AppM (H.248 Application Module), responsible realization protocol function H.248, the resource function of commander's resource processing modules implement media server; Make an explanation to act on behalf of the H.248 message that submodule H248PAM sends here from protocol stack H.248, and H.248 this used submodule H248AppM and resource part carry out the internal resource control protocol IRCP message that associative operation forms and send to the resource processing module; H.248, this is used submodule H248AppM and also comprises various and calling and protocol-dependent data structure, can manage calling under the control of the external control entity of media server;
SIP uses submodule SIPAppM (SIP Application Module), is responsible for realizing the protocol function of SIP, the resource function of commander's resource processing modules implement media server; Make an explanation to act on behalf of the sip message that submodule SIPPAM sends here from the Session Initiation Protocol stack, and this SIP is used the IRCP message that submodule SIPAppM and resource part carry out associative operation formation send to the resource processing module; This SIP uses submodule SIPAppM and also comprises various and calling and protocol-dependent data structure, can manage calling under the control of the external control entity of media server;
Universal information encapsulation submodule GMEM (General Message Encapsulation Module), be responsible for IRCP message is packaged into universal information agreement GMP (General Message Protocol) message, and be responsible for GMP message separated and be bundled into IRCP message, offer IRCP message user;
Master control submodule (OCM, Overall Control Module) is as overall operation scheduling sublayer module, be responsible for the initialization of other each submodules, call H248AppM and SIPAppM respectively with polling mode then, check each input message flow, and handle accordingly.
The function of described resource control module is: be responsible for the distribution and the release of all media resources; To carrying out the backstage distributed treatment via the signaling message after the universal information module package; The order that sends via the external control devices that is obtained after mutual with protocol stack module is handled, then, carry out alternately with the resource processing module, the use of control media resource is so that the resource processing module can adapt to various external control agreement again.
The function of described Operation and Maintenance access module is: receive the operational maintenance command that the Operation and Maintenance machine is sent, by with the mutual realization of universal information module Operation and Maintenance function to each other modules.
The function of described rearmounted machine is: accepts the control of front end processor, according to the instruction of front end processor media resource carried out and distributed, reclaim, identify and other operation, and the return result; Report the various operating states that each rearmounted machine is current according to setting strategy to front end processor, realize load balancing and flow control to cooperate front end processor; Receive and carry out by front end processor and transmit the operational maintenance command of coming, and return execution result; When finding front end processor generation unit fault, select wherein a rearmounted machine as main frame, and start the main frame process, again to outside controlled entity registration by example inspection message.
The universal information module of described rearmounted machine comprises two submodules: finish the real-time messages submodule of the distribution of signaling and other real-time messages and route control, and finish the distribution that comprises Operation and Maintenance message and webmaster message at least and the non real-time message submodule of route control; This universal information functions of modules is: communicate alternately with the universal information module in the front end processor, transmit message between front end processor and rearmounted machine.
The function of the resource processing module of described rearmounted machine is: be used to provide various media resources, and comprise the reception and the transmission of realtime transmission protocol RTP and RTCP Real-time Transport Control Protocol RTCP media bearer protocol message at least with external network entity, realize the two-way exchange of audio/video media information; Accept the control of the resource control module of front end processor, control the use of media resource by bottom hardware integrated circuit board resource or the API API that calls the Digital Signal Processing DSP of form of software, make the resource control module of front end processor can adapt to various bottom API API.
The function of described Operation and Maintenance machine is: front end processor and rearmounted machine are carried out operation and maintenance, insert front end processor by the Operation and Maintenance access module, all orders are all sent to front end processor, judged the final recipient of order by front end processor; Man-machine interface as the Operation and Maintenance personnel.
Describedly H.248 use between submodule H248AppM and the resource processing module and SIP uses that the self-defining internal resource control protocol IRCP of employing (InternalResource Control Protocol) communicates between submodule SIPAppM and the resource processing module; Adopt self-defining universal information agreement GMP (General Message Protocol) to communicate between each module of all the other of this media server.
The present invention is a kind of media server based on soft switch, and its design feature is to adopt the combining form of front end processor and rearmounted machine, flexible configuration, convenience, reliable operation.Can either guarantee that when the power system capacity demand improves the quantity that can dynamically increase rearmounted machine realizes the extensibility of server; Can in a single day the unit fault take place at front end processor again, and other rearmounted machines are when finding this fault by example inspection message, system can select wherein, and a rearmounted machine substitutes original front end processor, again by necessary block configuration, start the required process of front end processor, again to outside controlled entity registration the becoming intact media server of function, guarantee the unimpeded of telecommunication service.
Resource processing module in the rearmounted machine of the present invention is essential, and different therewith is that the resource processing module in the front end processor then is optional.Like this, when telephone traffic was low, front end processor can activate this module, has guaranteed that resource control module and resource processing module are in same physical computer, reduce the communication overhead between two modules, further improved processing capacity and the efficient of media server; And work as the telephone traffic increase more for a long time, front end processor can no longer activate this module, has reduced the workload of front end processor, simultaneously the resource processing module is placed in the rearmounted machine with extensibility, has improved the overall process ability of media server greatly.
The operational maintenance command of the rearmounted machine of the present invention is after passing through its Operation and Maintenance access module reception order from the Operation and Maintenance machine by front end processor, to be transmitted to rearmounted machine again; Rather than directly mutual by the Operation and Maintenance machine with rearmounted machine, guaranteed the transparency of the internal configurations structure of the entity that front end processor and rearmounted machine are formed to the Operation and Maintenance machine, guaranteed that also the single-point of Operation and Maintenance machine inserts, simplified access procedure.
The present invention adopts self-defining internal resource control protocol IRCP message for the information interaction between resource control module and the resource processing module, makes the resource control module for the resource processing module, can shield the difference of external control agreement; Be that the resource processing module can the perceptible medium server and the particular type of the mutual employed signaling protocol of external equipment (as SIP and H.248), the resource processing module is all handled to unify mode, make resource processing module and concrete signaling protocol irrelevant, reduced the upgrade maintenance workload of signaling protocol.Simultaneously, between resource control module and resource processing module, adopt the IRCP agreement, make the resource processing module, can shield the difference of bottom API for the resource control module; Be that the resource control module can the employed concrete API type of the current resource processing module of perception (as hardware integrated circuit board resource API or software DSPAPI), the resource control module is all handled to unify mode, has reduced the upgrade maintenance workload of media resource.
In addition, the present invention is in the inner self-defining universal information agreement GMP message of using of this device and the IRCP message of internal resource control protocol, make that this device can be according to needs in the future, increase support neatly, guaranteed the transparency of media server the standard signaling protocol to new signaling protocol (for example MGCP MGCP).
Description of drawings
Fig. 1 is that the structure that the present invention is based on the media server of soft switch is formed schematic diagram;
Fig. 2 the present invention is based on the media server of soft switch and the annexation schematic diagram of other network equipments;
Fig. 3 is the internal network connection diagram based on the media server of soft switch in the embodiment of the invention;
Fig. 4 the present invention is based on IRCP/GMP protocol stack structure schematic diagram in the media server of soft switch.
Embodiment
For making the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with drawings and Examples.
Referring to Fig. 1, the present invention is a kind of media server based on soft switch, this device includes: a front end processor 1 as main frame, many rearmounted machines as slave (are showed among the figure and are had three, be labeled as respectively: 2,3,4) and many Operation and Maintenance machines (showing among the figure has two, is labeled as respectively: 5,6); Wherein front end processor 1 includes: universal information module 12, and the protocol stack module 11, resource control module 13, the Operation and Maintenance access module 14 that are connected respectively with this universal information module 12 and the resource processing module 15 that can match; Rearmounted machine 2,3,4 includes respectively: interconnective universal information module 21,31,41 and resource processing module 22,32,42; All realize information interaction wherein between the universal information module 21,31,41 of the universal information module 12 of front end processor 1 and each rearmounted machine 2,3,4, and between the Operation and Maintenance access module 14 of front end processor 1 and each Operation and Maintenance machine 5,6 by communication line.
Front end processor 1 function of the present invention mainly comprises: carry out SIP by protocol stack module 11 and external network entity, H.248 wait the reception and the transmission of signaling; The various media resources of unified management, distribution and the whole media server of control (as digit receiver, audio mixing equipment, Video Codec etc.).As when calling enters media server, front end processor will distribute the media resource of the free time of suitable species, suitable quantity to use to this calling, and carry out in the process in calling, front end processor also can increase and decrease the media resource that this calling is used with the algorithm of setting as required, and when end of calling, front end processor will reclaim the media resource that distributes before this, and makes it to be in idle condition, uses for other follow-up callings.When media resource broke down, front end processor 1 was a down state with this resource identification, after the media resource that lost efficacy is repaired, again it was designated upstate.Each rearmounted machine is carried out load balancing control and flow control; Specific practice is: front end processor carries out integrated treatment according to total disposal ability of current each rearmounted machine, the idle disposal ability of each rearmounted machine, the new required factors such as disposal ability of calling that insert, handle to which rearmounted machine the call distribution of current new access with decision, to realize the load balancing between each rearmounted machine, improve the total throughput of media server, avoid some rearmounted machine overload takes place and the lighter situation of other rearmounted machine loads.When the call volume that enters media server is very big, front end processor can be according to the load condition of current each rearmounted machine, admit the new calling of a part selectively according to setting strategy and algorithm, and be transmitted to rearmounted machine, can not paralyse because load is too big to guarantee rearmounted machine.Carry out alternately with the Operation and Maintenance machine, reception and executable operations are safeguarded the various operation and maintenance orders of eedle to front end processor, and return execution result; Represent the various operation and maintenance orders of rearmounted machine reception simultaneously, and be transmitted to corresponding rearmounted machine, and be responsible for concrete the execution by corresponding rearmounted machine at rearmounted machine.The resource processing module that wherein can match is used to provide various media resources, and carry out the reception and the transmission of realtime transmission protocol RTP/media bearer protocol messages such as RTCP Real-time Transport Control Protocol RTCP with the network entity of outside, reach the purpose of media informations such as two-way exchange audio frequency, video.
The function of rearmounted machine mainly comprises: be provided with the resource processing module and be used to provide various media resources, and carry out the reception and the transmission of media bearer protocol messages such as RTP/RTCP with the network entity of outside, reach the two-way exchange audio frequency, the purpose of media informations such as video.Accept the control of front end processor, carry out the concrete operations such as distribution, recovery, sign of media resource according to the instruction of front end processor, and the return result.Report the state that each rearmounted machine is current according to setting strategy to front end processor, as normal state, fault case, the light load attitude, overload attitudes etc. realize mechanism such as load balancing, flow control to cooperate front end processor; Reception is returned execution result by operational maintenance command and execution that front end processor forwards.If the unit fault has taken place front end processor, then other rearmounted machines are found this fault by example inspection message, and select wherein one to start the required process of main frame as main frame, again to outside controlled entity registration.
The function of Operation and Maintenance machine mainly is: front end processor and rearmounted machine are carried out operation and maintenance, insert front end processor as required, front end processor is all issued in all orders, is judged the final recipient of order by front end processor; Man-machine interface as the Operation and Maintenance personnel.
The installation site of media server of the present invention in network system as shown in Figure 2.Softswitch can be controlled media server, and application server equally also can be controlled media server by the Parlay gateway.Media server is at control appliance (Softswitch for example, or application server/Parlay gateway) under the control, can with Voice extensible Markup Language VoiceXML archive server interactive communication, obtain the service logic of VoiceXML form, to indicate next step operation to media resource; Also can communicate by letter, to finish conversion of literary composition language or automatic speech recognition function with literary composition language conversion TTS (Text To Speech)/automatic speech recognition ASR (Automatic Speech Recognition) server interaction.Media server can also communicate by the terminal in media gateway and the legacy network, and the various media informations of bi-directional also can be supported to set up direct bearer path between the terminal of IP agreement in this media server and next generation network.
Referring to Fig. 3, the present invention has carried out test and has implemented in Beijing University of Post ﹠ Telecommunication's network and exchange National Key Laboratory, the front end processor 1 of this media server experimental prototype adopts 1 HP minicomputer RP3410 (2 CPU, CPU frequency is 800MHz, operating system is HPUX 11i, in save as 1G, hard disk is 2 * 72G) compositions, rearmounted machine 2,3,4 have 3, adopt respectively 1 Ling Hua CSP-9801 industrial computer (CPU is Intel Pentium III 1GHz, and operating system is solaris 8, in save as 512M, hard disk is 36G, the resource integrated circuit board is NMS CG6000) to form, Operation and Maintenance machine 5 adopts 1 PC, and (CPU frequency is Intel2.2GHz, and operating system is Windows XP, in save as 256M, hard disk is 40G).Wherein all pass through an Ethernet switch 7 between front end processor 1, rearmounted machine 2,3,4 and the Operation and Maintenance machine 5 and constitute a local area network (LAN), to realize communicating by letter between front end processor 1 and rearmounted machine 2,3,4, front end processor 1 and the Operation and Maintenance machine 5.
Again referring to Fig. 1, be example with the basic playback process that collects the digits below, specifically introduce the engagement process of inner each module of media server of the present invention:
When the protocol stack module in the front end processor 1 11 receives one when require setting up new message (the 1st message) of calling out from the external control entity, protocol stack module 11 with this message with the GMP protocol encapsulation after, send to universal information module 12; Universal information module 12 is given resource control module 13 according to the information in the GMP message header with this forwards; The GMP message that 13 pairs of resource control modules receive is carried out decapsulation, again according to the data of the current global resource operating position of grasping, applied load equilibrating mechanism and flow control mechanism, whether to handle to the resource processing module this new call distribution, and distribute to which resource processing module with decision; The control and treatment result who supposes above-mentioned two mechanism is to the resource processing module 32 in the rearmounted machine 3 with this new call distribution, then resource control module 13 is at first upgraded the call instance dynamic data by self-management, to intend the media resource status indication of distribution for taking, use GMP protocol encapsulation IRCP message then, send to universal information module 12; Universal information module 12 in the front end processor 1 is given universal information module 31 in the rearmounted machine 3 according to the information in the GMP message header with this forwards; Universal information module 31 further is transmitted to resource processing module 32 with this message, the GMP message that 32 decapsulations of resource processing module receive, and give the suitable playback resource of this new call distribution according to the IRCP message that receives, set up the transmitting-receiving port of a RTP.After operating successfully, resource processing module 32 return results: at first carry the IRCP message of operating result, send to universal information module 31 then with the GMP protocol encapsulation; Follow-up message bang path is identical with the message bang path of setting up new calling just now, but direction is just in time opposite, does not repeat them here.
When the protocol stack module in the front end processor 1 11 when the external control entity receives a message that requires playback and collect the digits (the 2nd message), the repeating process of its forwards process and above-mentioned the 1st message is similar, different is no longer applied load equilibrating mechanism and flow control mechanism of resource control module 13, but the call instance dynamic data of inquiry self-management sends to this message the resource processing module 32 of the rearmounted machine 3 of handling this calling; The GMP message that 32 decapsulations of resource processing module receive, and broadcast the voice document of appointment to the RTP port of having set up according to the IRCP message that receives; Equally, operate successfully resource processing module 32 return results afterwards, its process is identical with the transmittance process that returns the 1st operating result that message is corresponding, repeats no more.
At this moment, service-user just can have been heard the voice suggestion of media server transmission; If the keyboard input dual-tone multifrequency digital signal of user's this moment by terminal, the resource processing module 32 of media server just can from RTP port that this calling is associated receive the digital signal of input; Resource processing module 32 receives after the complete digital signal, just these numerals is placed in the IRCP message bag, along return result's bang path, they is sent to the external control entity.
When the protocol stack module in the front end processor 1 11 when the external control entity receives a message (the 3rd message) that requires terminated call, the repeating process of its forwards process and the 2nd message is similar, different is when resource processing module 32 receives corresponding IRCP message, the media resource of this calling and return result are distributed in release.Resource control module 13 is upgraded the call instance dynamic data of self-management when receiving the operating result message that resource processing module 32 sends, be the free time with the corresponding resource status indication; Media server finally returns to the external control entity by protocol stack module 11 with the operating result of the 3rd message.
Referring to Fig. 4, with resource control module 13 in the front end processor 1 and the information interaction between the resource processing module 32 in the rearmounted machine 3 is example, briefly introduce the IRCP/GMP protocol stack structure in the media server that the present invention is based on soft switch: universal information agreement GMP is that internal resource control protocol IRCP is then further carried by GMP by the carrying of the transmission control protocol TCP on the IP agreement.Not only to handle the GMP agreement between resource control module 13 and the resource processing module 32, also need to handle simultaneously the IRCP agreement; And only need to handle the GMP agreement between their the universal information module 12 and 31, also promptly for these two universal information modules, the content of IRCP agreement is transparent, and is sightless.GMP is that a hop-by-hop is handled the agreement of (hop by hop), and IRCP is the agreement of end-to-end (end to end).
Claims (13)
1. media server based on soft switch, it is characterized in that: this device includes: a front end processor as main frame, many rearmounted machine and Duo Tai Operation and Maintenance machines as slave; Described front end processor includes: universal information module, and the protocol stack module, resource control module and the Operation and Maintenance access module that are connected respectively with this universal information module; Rearmounted machine includes: interconnective universal information module and resource processing module; All realize information interaction wherein between the universal information module of front end processor and each rearmounted machine, and between the Operation and Maintenance access module of front end processor and each Operation and Maintenance machine by communication line; Described front end processor can be matched the resource processing module, the function of this resource processing module is: be used to provide various media resources, and comprise the reception and the transmission of realtime transmission protocol RTP and RTCP Real-time Transport Control Protocol RTCP media bearer protocol message at least with external network entity, realize the two-way exchange of audio/video media information; Accept the control of resource control module, control the use of media resource by bottom hardware integrated circuit board resource or the API API that calls the Digital Signal Processing DSP of form of software, make the resource control module can adapt to various bottom API API.
2. media server according to claim 1 is characterized in that: the function of described front end processor is: include but not limited to SIP signaling or the H.248 transmitting-receiving transmission of signaling by protocol stack module and external network entity; Various media resources to this media server carry out unified management, distribution and control; Each rearmounted machine is carried out flow control and load balancing control; Carry out information interaction by Operation and Maintenance access module and Operation and Maintenance machine, various operation/maintenance commands that reception and executable operations maintenance machine send at front end processor, and return execution result; And represent rearmounted machine to receive various operation/maintenance commands that the Operation and Maintenance machine sends, and be transmitted to corresponding rearmounted machine at rearmounted machine.
3. media server according to claim 1, it is characterized in that: described protocol stack module comprises two submodules: finish the protocol stack front terminal module that the message bag of the transport layer of standard signaling message and following protocol layer is handled, and the protocol stack of finishing the encoding and decoding of standard signaling message is acted on behalf of submodule; The function of this protocol stack module is: externally carry out protocol conversion between controlled entity and the internal resource control module, finish the encoding and decoding of signaling message.
4. media server according to claim 3, it is characterized in that: described protocol stack is acted on behalf of submodule and is acted on behalf of submodule H248PAM and Session Initiation Protocol stack by protocol stack H.248 and act on behalf of submodule SIPPAM two parts and form, these two protocol stacks are acted on behalf of submodule and are utilized universal information agreement GMP respectively decode later H.248 protocol message or Session Initiation Protocol message to be encapsulated, and offer respectively by the universal information module and H.248 to use submodule H248AppM or SIP and use submodule SIPPAM; The H.248 protocol message that the process that H248 application submodule H248AppM or SIP application submodule SIPAppM produce self with GMP is encoded or the essential information of Session Initiation Protocol message do not encapsulate respectively, and send this two agency by agreement submodules respectively to by the universal information module, issue the control appliance of media server after by these two agency by agreement submodules message being encoded again.
5. media server according to claim 1, it is characterized in that: the universal information module of described front end processor comprises two submodules: finish the real-time messages submodule of the distribution of signaling and other real-time messages and route control, and finish the distribution that comprises Operation and Maintenance message and webmaster message at least and the non real-time message submodule of route control; This universal information functions of modules is as between each module of front end processor and the signal centre between front end processor and the rearmounted machine, for the communication between each module provides route and transmits message.
6. media server according to claim 1 is characterized in that: described resource control module comprises:
Resource management submodule RMM is used for managing this device and relates to SIP and the H.248 management of resource capability and the various resources of control protocol itself; This submodule obtains the loading of the Digital Signal Processing DSP ability of the hardware integrated circuit board ability of media server and form of software by the resource distribution file; And for H.248 use submodule H248AppM and SIP use submodule SIPAppM provide resource various descriptions and with protocol-dependent resource;
H.248 use submodule H248AppM, responsible realization protocol function H.248, the resource function of commander's resource processing modules implement media server; Make an explanation to act on behalf of the H.248 message that submodule H248PAM sends here from protocol stack H.248, and H.248 this used submodule H248AppM and resource part carry out the internal resource control protocol IRCP message that associative operation forms and send to the resource processing module; H.248, this is used submodule H248AppM and also comprises various and calling and protocol-dependent data structure, can manage calling under the control of the external control entity of media server;
SIP uses submodule SIPAppM, is responsible for realizing the protocol function of SIP, the resource function of commander's resource processing modules implement media server; Make an explanation to act on behalf of the sip message that submodule SIPPAM sends here from the Session Initiation Protocol stack, and this SIP is used the IRCP message that submodule SIPAppM and resource part carry out associative operation formation send to the resource processing module; This SIP uses submodule SIPAppM and also comprises various and calling and protocol-dependent data structure, can manage calling under the control of the external control entity of media server;
Universal information encapsulation submodule GMEM is responsible for IRCP message is packaged into universal information agreement GMP message, and is responsible for GMP message separated and is bundled into IRCP message, offers IRCP message user;
Master control submodule OCM as overall operation scheduling sublayer module, is responsible for the initialization of other each submodules, calls H248AppM and SIPAppM respectively with polling mode then, checks each input message flow, and handles accordingly.
7. according to claim 1 or 6 described media servers, it is characterized in that: the function of described resource control module is: be responsible for the distribution and the release of all media resources; To carrying out the backstage distributed treatment via the signaling message after the universal information module package; The order that sends via the external control devices that is obtained after mutual with protocol stack module is handled, then, carry out alternately with the resource processing module, the use of control media resource is so that the resource processing module can adapt to various external control agreement again.
8. media server according to claim 1, it is characterized in that: the function of described Operation and Maintenance access module is: receive the operational maintenance command that the Operation and Maintenance machine is sent, by with the mutual realization of universal information module Operation and Maintenance function to each other modules.
9. media server according to claim 1 is characterized in that: the function of described rearmounted machine is: accept the control of front end processor, according to the instruction of front end processor media resource is carried out and distributed, reclaim, identify and other operation, and the return result; Report the various operating states that each rearmounted machine is current according to setting strategy to front end processor, realize load balancing and flow control to cooperate front end processor; Receive and carry out by front end processor and transmit the operational maintenance command of coming, and return execution result; When finding front end processor generation unit fault, select wherein a rearmounted machine as main frame, and start the main frame process, again to outside controlled entity registration by example inspection message.
10. according to claim 1 or 9 described media servers, it is characterized in that: the universal information module of described rearmounted machine comprises two submodules: finish the real-time messages submodule of the distribution of signaling and other real-time messages and route control, and finish the distribution that comprises Operation and Maintenance message and webmaster message at least and the non real-time message submodule of route control; This universal information functions of modules is: communicate alternately with the universal information module in the front end processor, transmit message between front end processor and rearmounted machine.
11. according to claim 1 or 9 described media servers, it is characterized in that: the function of the resource processing module of described rearmounted machine is: be used to provide various media resources, and comprise the reception and the transmission of realtime transmission protocol RTP and/or RTCP Real-time Transport Control Protocol RTCP media bearer protocol message at least with external network entity, realize the two-way exchange of audio/video media information; Accept the control of the resource control module of front end processor, control the use of media resource by bottom hardware integrated circuit board resource or the API API that calls the Digital Signal Processing DSP of form of software, make the resource control module of front end processor can adapt to various bottom API API.
12. media server according to claim 1, it is characterized in that: the function of described Operation and Maintenance machine is: front end processor and rearmounted machine are carried out operation and maintenance, insert front end processor by the Operation and Maintenance access module, all orders are all sent to front end processor, judge the final recipient of order by front end processor; Man-machine interface as the Operation and Maintenance personnel.
13. media server according to claim 6 is characterized in that: describedly H.248 use between submodule H248AppM and the resource processing module and SIP uses that the self-defining internal resource control protocol IRCP of employing communicates between submodule SIPAppM and the resource processing module; Adopt self-defining universal information agreement GMP to communicate between each module of all the other of this media server.
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| CN100589487C (en) * | 2006-01-11 | 2010-02-10 | 华为技术有限公司 | In the SIP communication network and the method for media apparatus interaction |
| CN101277505B (en) * | 2008-05-09 | 2011-11-30 | 北京邮电大学 | Method and apparatus for optimization of protocol stack of communication system based on subassembly |
| CN101610488B (en) * | 2008-06-20 | 2014-06-11 | 杭州世导科技有限公司 | Internet communication tool uniformly coding and dialing system and internet communication tool uniformly coding and dialing method |
| CN102957817A (en) * | 2011-08-22 | 2013-03-06 | 北京百通天下科技发展有限公司 | Network communication and voice communication integrated all-in-one office machine |
| CN103151041B (en) * | 2013-01-28 | 2016-02-10 | 中兴通讯股份有限公司 | A kind of implementation method of automatic speech recognition business, system and media server |
| CN107682301B (en) * | 2016-08-02 | 2020-05-01 | 中国电信股份有限公司 | Method, device and system for realizing traffic control |
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